I thought evolution applied to all until we found in man (and some animals) there was a missing link that no one has yet convincingly explained.
Apparently we should not be evolved as we are for the time it took.
Even the proponent of evolution (Darwin) in his earlier books wrote about this missing link, which baffled him too, and still baffles others today.
I suppose that is why it leaves it open for all sorts of theories from aliens and genetic manipulation etcetera.
Maybe its better we don't find out, but then again that's part of the fun of living, being curious.